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Updated: May 26, 2025
Here or there a heap of whitish dust betrayed where some of its detritus still lay. Gone was every picture, chart, and map which but an hour since, it seemed to her had decked this office of Allan Stern, consulting engineer, this aerie up in the forty-eighth story of the Metropolitan Tower. Furniture, there now was none.
This daily Maelstrom is sufficient to account for the formation of the mighty sandbank, for the water is laden with the detritus of cliff and beach which it has taken up in its course round England, and, just as if you give a circular motion to a basin of muddy water, you will soon find the earthy deposit centralised at the bottom of the basin, so the great Goodwins are the result of the daily deposit of revolving tides.
Even before they have attained a great depth, through the laying down of later deposits upon them, changes begin which serve to alter their structure. The fragments of a soluble kind begin to be dissolved, and are redeposited, so that the mass commonly becomes much more solid, passing from the state of detritus to that of more or less solid rock.
The floor of the valley immediately above Garfield glacier, though several miles wide, was partly filled with detritus which had been carried down from the mother range on the east, and this mass of debris had forced the stream far over against the westward rim, where it came roaring past the foot wall in a splendid cataract some three miles long.
This cone is composed of layers of scoriae, pumice- stones, and their fine detritus, with interposed beds of trachyte and basalt, which descend often in uninterrupted sheets until they reach and spread themselves round the base of the mountain.
There is another element in the movement of the soils which, though less appreciable, is still of great importance. The agents of decay which produce and remove the detritus, the chemical changes of the bed rock, and the mechanical action which roots apply to them, along with the solutional processes, are constantly lowering the surface of the mass.
We ascended to the top of this, and found it covered with blocks of gneiss, and much angular detritus. Hence the road gradually ascends, and becomes clayey. Argillaceous rocks, and a little ochreous sandstone appeared in highly-inclined strata, dipping north, and covered with great water-worn blocks of gneiss.
Just then he would have given a gun-metal case, filled with cigars the only treasure he possessed for a Portuguese dictionary. After a really difficult and hazardous descent, they found the others awaiting them in a rock-shrouded cove. The barest standing-room was afforded by a patch of shingle and detritus. Alongside a flat stone lay three broad planks tied together with cowhide.
Magnificent floods from the ample fountains of ice and snow working with sublime energy upon this prepared glacial detritus, sorted it out and carried down immense quantities from the higher slopes, and reformed it in smooth, delta-like beds around the base; and it is these flood-beds joined together that now form the main honey-zone of the old volcano.
In the Cordillera of South America, nearly under the equator, glaciers once extended far below their present level. In central Chile I examined a vast mound of detritus with great boulders, crossing the Portillo valley, which, there can hardly be a doubt, once formed a huge moraine; and Mr.
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